"The soul wandering in the world is tied to the world and does not want reincarnation. Let me fulfill your wish."
"Tell me, what is your wish?"
"I will fulfill your wish, but in return you must give yourself to me once your wish is fulfilled. If you are willing, please raise your left hand."
"Once the contract is completed, you cannot go back on it, otherwise you will lose your soul."
"I am willing to make a contract with you. If I regret it, my soul will fly away and I will never be reincarnated!"